Suggestion: modifying the TP4056 to operate closer to the MPP of the panel

[FBMinis]

It is explained here that these little 5V panels will never deliver the 1A current the TP4056 is setup to pull:

https://youtu.be/37kGva3NW8w?t=320

I have determined that the MPP of my solar panel under full sunlight is reached with current around 80mA using this test method:

https://makersportal.com/blog/solar-panel-characterization-and-experiments-with-arduino https://wolles-elektronikkiste.de/en/ina219-current-and-power-sensor

I suggest replacing the 1.2K resistor on the TP4056 with a 20K trimmer potentiometer and slowly increase the resistance until the power value reaches a maximum.

Simple_method_for_I-V_characterization_curve_for_l.pdf

Sunlight based I-V characterization of solar PV.pdf

Thank you for your project, I'm going to try to build it. The code is very well commented, I think it will be straightforward.

Regards